def add(a,b,c):
    return a+b+c
sum=add(1,23,4)
print(f'the sum is {sum:.3f}',end='\t')

zz=int
a=zz(input('input a number:'))
print(f'the  sum is {a}')

print(locals())
print(globals())

b=[10,20]
print(id(b))
def add(m):
    print(id(m))
    m.append(30)
    print(m)
add(b)
print(b)

